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The centrifugal separation with gravity experiment was made for getting every pure macerals like inertinite and vitrinite,
and the isothermal adsorption tests of pure maceral are carried out at 30, 40, 50, 55, 60, 65 °C, respectively, after analyzing
the proximate, element and maceral of coal samples, which was aimed to study the CO adsorptive capability of every maceral
of low rank coal at difference temperature and pressure. The results show that the adsorption isotherm of CO can be described
by Langmuir equation because it belongs to the Type I adsorption isotherm at low temperature(T⩽50 °C), and the temperature effect on coal adsorption is greater than of pressure in lower temperature and pressure area;
what’s more, the relationship is linear between the coal adsorption quantity of CO and the pressure at high temperature(T>50 °C), it can be described by Henry equation(Q=KP), which increases with pressure. Both temperature and pressure has great influence on CO adsorptive capability of low rank
coals, especially the temperature’s effect is so very complex that the mechanism need to study further. At the same time,
the volatile matter, inertinite, oxygen-function groups and negative functional groups are high popularly in low rank coal
samples, especially, the content of hydroxide(-OH) has great influence on CO adsorption in that the inertinite has stronger
effect than vitrinite on adsorptive capability of low rank coal samples, the result is same to the research on CH4 adsorption.
Supported by the National Natural Science Foundation of China (50474080); Educational Department Foundation for Returnee 相似文献
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为了研究煤层膨胀增透材料水化反应放热对煤体的作用范围,通过自制的实验装置测定了膨胀材料的膨胀压力及反应温度随时间的变化数据,并采用数值模拟分析了膨胀材料在升温与降温阶段,对钻孔周围煤体的温度影响规律及影响范围。研究结果表明:煤层膨胀增透材料水化反应产生的最大膨胀压力约为47 MPa,最高水化反应温度为103.5 ℃;膨胀材料温度变化可分为缓慢升温、快速升温、降速升温和降温4个阶段;在直径100 mm膨胀钻孔条件下,煤体受膨胀材料的温度作用半径可达1.2 m,可有效增加该范围内的瓦斯分子动能,加速瓦斯解吸,提高瓦斯抽采效率。 相似文献